Fire-alarm.



F. SIMONYI.

FIRE ALARM.

APILIOATION- FILED JULY 21, 1910.

991,903. Patented May 9, 1911.

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FRANK SIMONYI, OF NEW YORK, N. Y.

FIRE-ALARM.

Specification of Letters Patent. Application filed. July 21 Patented May9, 1911.

, 1910. Serial No. 573,054.

To all whom it may concern:

Be it known that I, FRANK SIMoNYI, a subject of the King of Hungary, anda resident of the city of New York, in the county of New York and Stateof New York, have invented certain new and useful Improve ments inFire-Alarms, of which the following is a specification.

The present invention relates to automatic fire alarms, and morethermostat which closes an electric circuit into which audible orvisible signals are inserted, when the temperature in the various roomsof a building, which are equipped with the device forming the subjectmatter of the present invention, rises above a predetermined degree andproduces thereby a draft of air.

One of the objects of the invention is to provide an apparatus of thecharacter specified which is cheap and practicable for causing andtransmitting the signals in case of fire in a building with a minimumliability of signals being induced from other cause than fire.

With these and other objects in View, which will appear as the nature ofthe invention is better understood, the same consists in theconstruction, arrangement and combination of parts hereinafter fullydescribed, pointed out in the appended claim and illustrated in theaccompanying drawings, it being understood that various changes may bemade in the size, proportion and minor details of construction withoutdeparting from the spirit or sacrificing any of the advantages of theinvention.

One of the many possible embodiments of the invention is illustrated inthe accompanying drawings, in which Figure 1 is a side elevation of thethermostat, forming the subject matter of the present invention; andFig. 2 a section taken on line 2, 2 of Fig. 1.

In the drawings, the numeral 5 indicates the frame of the thermostatwhich may be of any suitable configuration and size. The frameillustrated in the drawings comprises a base plate 6, carried byvertical posts 7, 7, which are attached to a tubular member 8, whichlatter is provided with inner screw threads 9, meshing with the threadsof a rod which is attached to the ceiling of the building. The devicemay be arranged a suitable distance below the ceiling,

particularly to a room being equipped with one or more of the same.

At or near the upper ends of the posts 7 is arranged a horizontal bar12, havingatubular portion 13, arranged in the center line of theapparatus and in alinement with a tubu lar portion 14:, attached to ormade integral with the base plate 6 of the frame. Both tubular portions13 and 14 are provided with inner screw threads, in mesh with thethreads of pointed screws 15 and 16, respectively, which form adjustablebearings of the shaft 17 of a propeller 18 of the fan type. The blades19 of this propeller are made of a non-combustible and light material sothat a rotation is readily imparted to the same by the hot air current.Upon the shaft 17 of the propeller is mounted an eccentric 20, made ofmetal to form a conductor for the purpose hereinafter to be specified.On the base plate 6 are furthermore arranged two vertical posts 21 and22, insulated from the base plate by means of blocks 23 and 24:,respectively, of insulating material. To these posts are attachedmetallic spring contacts 25 and 26, respectively, extending toward theshaft 17 of the propeller, but not contacting with each other. Thedistance between the longitudinal axis of the shaft 17 and the innerends 27 and 28 of the spring contacts 25 and 26, respectively, issomewhat less than the distance between the axis of said shaft and theouter most peripheral portion 29 of the eccentrio 20.

The vertical posts 21 and 22, which are made of metal, are inserted intoan electric circuit, containing any suitable source of electric energyand a bell or other signal, which latter is arranged at a distant point,for instance at the superintendents oflice of the building or at apoliceor fire-station.

The operation of the device is as follows: The fan propeller 18 is setso that the peripheral portion of the eccentric which each 1 the springcontacts outward lies nearest to the longitudinal axis of propellershaft 17 comes to stand opposite to the inner ends of the contactsprings and 26. Normally, therefore, the electric circuit is kept open.As soon as, however, a fire originates in the room, the current of hotair which flows toward the ceiling causes a rotation of the fanpropeller 18, whereby, as soon as the portion 29 of the eccentric forcesfrom the center line of the apparatus, a connection will be establishedbetween the spring contacts 25 and 26, closing thereby the circuit andactuating thus the signal. The spring con tacts 25 and 26 will tend tohold the propeller against rotation, whereby a continuous signal will begiven. If, however, the current of air is so strong that the tension ofthe springs is overcome, the eccentric 20 will make and break thecontacts, whereby an intermittent signal will be obtained.

\Vhat I claim is:

In a fire alarm, the combination with a tubular member provided withinner screw threads, of two vertical posts carried thereby, a horizontalbase plate attached to said vertical posts, a horizontal bar arranged atthe upper end of said posts having an interiorly screw threaded tubularportion, an interiorly screw threaded tubular projection upon said baseplate in alinement with the tubular portion upon said horizontal bar, a

vertical shaft, pointed set screws engaging said tubular portions andsupporting rotatably said shaft, a vane wheel attached to said shaft andadapted to be operated by a draft of air, vertical posts supported byand insulated from said base plate, metallic spring contacts attached tosaid posts extending toward of contact with each other, a metalliceccentric fixedly attached to said shaft in the plane of said springsand adapted to make and break the contact between said springs as saidvane wheel is operated by a draft of air.

Signed at New York, in the county of New York and State of New York,this 19th day of July, A. D. 1910.

FRANK SIMONYI.

,Vitnesses RANASZ NAG. PAINE, SIGMUND Hnnzoo.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). 0.

said shaft and normally out

